A virus is mostly made of hereditary material (DNA or RNA) with a protein covering. It has no nucleus, no mitochondria, and few other parts that are usually found in a cell. Use the Cell Theory to explain whether a virus is alive or not. A virus is not alive, because each individual virus lives by itself. A virus is not alive, because it is not made of cells. A virus is alive, because new viruses come from existing viruses. A virus is alive, because it can attack animal cells, and use the animal cells to produce new viruses.

the radius is 2 times the diameter.

step-by-step explanation:

d. corresponding side lengths in similar triangles are proportional in length.

step-by-step explanation:

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)